Method for improving shock resistance of Y-shaped pier

A bridge pier and capacity technology, applied in bridges, bridge parts, bridge materials, etc., can solve the problems of complex design of Y-shaped piers and weak seismic performance, and achieve the effects of improving mechanical performance, convenient positioning and clear force

Active Publication Date: 2018-05-01
SHENYANG JIANZHU UNIVERSITY
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The Y-shaped piers of urban viaducts are a kind of special-shaped piers. The research on their seismic capacity is different from that of ordinary rectangular piers, and is more related to their own size ratio. , it is also considered that the smaller floor area supports the wider bridge deck, and the pier should have a certain seismic capacity on the basis of the stability of the above conditions. Therefore, the design of the Y-shaped pier is extremely complicated.
In the past, Y-shaped bridge piers generally had poor seismic performance. As the country pays more attention to the seismic performance of urban viaducts, it is urgent to ensure that the "traffic lifeline" can play an effective role in earthquake relief in case of sudden earthquakes. Reinforcing method of anti-seismic capacity of shaped bridge piers

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for improving shock resistance of Y-shaped pier
  • Method for improving shock resistance of Y-shaped pier
  • Method for improving shock resistance of Y-shaped pier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0029] The urban elevated Y-shaped pier in this embodiment has a bottom section size of 160cm × 500cm, and the cross-sectional size of the arms and legs is 160cm × 190cm. The pier body material of the urban elevated Y-shaped pier is C40 concrete, and the pier body of the urban elevated Y-shaped pier Use HRB335 steel bar.

[0030] (1) a method for improving the seismic capacity of Y-type bridge piers, comprising the following steps:

[0031] Step 1. Beam reinforcement

[0032] A crossbeam is set between the two limbs of the Y-shaped pier to connect the two limbs. At the same time, prestressed steel bars are arranged on the crossbeams of the Y-shaped pier. See figure 1 , specifically, arrange a row of N1-N13 prestressed steel bars at the upper end of the beam, and arrange a row of N14-N26 prestressed steel bars at the lower end of the beam;

[0033] The prestressed steel bars form the prestressed steel tendons, and the external force generated by the prestressed steel tendons ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention belongs to the technical field of urban viaduct pier engineering, and provides a method for improving shock resistance of a Y-shaped pier. The method for improving shock resistance of the Y-shaped pier comprises the steps that a cross beam is arranged between two limb arms of the Y-shaped pier to connect the two limb arms, and meanwhile, prestressed steel bars are arranged at the cross beam of the Y-shaped pier and dense stirrups are arranged on the two limb arms and a U-shaped groove of the Y-shaped pier; and the grade of the dense stirrups at the two limb arms of the Y-shaped pier is the same as that of non-dense-region stirrups of the Y-shaped pier, and the grade of the dense stirrups at the U-shaped groove of the Y-shaped pier is preferably higher than that of the non-dense-region stirrups of the Y-shaped pier. According to the method, the prestressed steel bars are arranged on the cross beam, so that stress is clear, and positioning is convenient; the structure is similar to the triangular structure, the stability is high, and plastic hinges and a pier body are densified with the stirrups, so that the problem of reinforcement of an anti-seismic weak region near the two limb arms and the U-shaped groove is effectively solved; and the work amount is small, and the maintenance is convenient.

Description

technical field [0001] The invention relates to the technical field of urban viaduct pier engineering, in particular to a method for improving the seismic capacity of Y-shaped pier. Background technique [0002] Y-shaped piers are favored by designers of urban overpasses and viaducts for their elegant appearance. However, due to the importance of the structure and the particularity of the structure form of the pier body of the Y-shaped bridge pier, there are many weak links in these structures when the earthquake disaster occurs. At present, there is no relevant code to follow for the seismic design of Y-shaped bridge piers at home and abroad, and there are few studies on its seismic performance. The "Detailed Rules for Seismic Design of Highway and Bridges" implemented by the Ministry of Communications on October 1, 2008 has been greatly different and improved in terms of the concept and essentials of seismic design, the value of seismic action, and the essentials of seism...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): E01D22/00E01D19/02E01D101/28
CPCE01D19/02E01D22/00E01D2101/28
Inventor 李艳凤罗威力侯世伟孙宝芸
Owner SHENYANG JIANZHU UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products